Fluid flow silencer



Nm 24, 19M. J. E. EWCSQN FLUD FLOW SILENCER Filed April 26, 1926 y v INVENTOR'.

J, IQ/0.90m l E? ATTORNEY. L

` by lessen its efficiency.

-,provide a device of the classdescribed which Patented Nov. 24, 1931 i y p L ,Ion-EDWIN EnicsoN, lor OAKLANDQOALIFORNIA y V Amiucation meanprilfsie,

`, inventionfrelates toy ay device torrendering inaudible the flow of fluid, and Which is particularly applicable as a means for silencing theflovv of :liquids in pipes.

An objectof the invention isto providefa :device o'fthe character described which will VV,not only serve to silence the sound of flowing luid,'but will also'absorb the shocks, both as in'the'fluid pressure.V .I ,o y y o u Another "obije'ctofltheinvention is to proto audibility andpfor'ce, causedlby changes 10 i l i i I vvide a Vdevi'ceofthe class described which vvill Anot `become"cloggedy with sediment andthere- A yfurther object of theinvention iste will be adjustable to Vmeet varying ,operative conditions. o y op The lnvention possesses yother objects and lfeature's of advantage, some'ofwhich, with the foregoing, Will .set forthv inthe yfollowing description ofV the preferred forml of my invention which isillustrated inthe drawing accompanying/and forming part of the specification. It, is to be understood that I do not limit myself to theshovving ,made

. by the said drawingvanddescriptiomfas Imay adopt variations of the preferred form Within thev'scope of my invention'as' set'forth in the f'zlatinis.l .o A

uReferring toV said drawing y The figure showsthe device ofmy invention operatively disposed between a valve and supply'pipe leading thereto, the major portion of the device being shown in longitudinal section.

As is Well known, the rapid flow of fluids,

and particularly that of liquids, through conduits usually produces a sound which is particularly audible and is frequently most ansze. yserial,110.104.3559.; t i c f 'fore been builtfinand so hasbeen subjected to certain structural and. operative disadvantages Which have servedtoprevent a general surges, which inV the, caseV of Eliquids such as Water, produce mechanical shocksy andzyhammering sounds 1n the pipe, so that elimination of the possibilitylof' the reduction lof the, Vlatter effects is Valso most y esirable. L

.y 'Itwill nowbe noted that in accordance with "my ,inventiorn'v both mechanical shocks use thereof. Furthermore, the sudden-startl-y king or stopping of the fluid flow produces andthe emission of sounds are preventedby means of one device. s Briefly, d the device, comprises ythe use' ina pipeor conduit olf-.a ,member having a helical port therein through which, ,the liquid` is arrangiedfltogpass as it moves toward the pipeoutletQ-Means are provided for adjusting the areaof theport yso that thequantity flow cof' liquid therethrough may be controlled. Y v

A ysillustrated,-the silencer device@ of inventionv `is operatively, disposed betweena ktoilet tank outlet valve f3 and, yaV tank supply y :pipe 4 and is connectedto keach by means of suitable r couplings l6V and respectively. As heresh'own, the silencer is formed .of connectedv sections 8, 9,- and ,10,.the former being here shown connected Vto `the pipe 4 means Vof.the'coupling"7 and is adapted to extend ,through and to have a fiangevportion 12 thereof clamped against a Wall 13Y of'a tank or `the likeby means ofvnuts lffandl `arqramgedfor threadedV engagement with thesection i 8 on the opposite side of `thejwall ,froml the can @12; f .1, t.

' p The section 10, it Will'be noted, isprovided ywith aftransverse extension-Q17 yarranged for lconnection Withthe'couplin'g 6` and lhaving n a bore 18 connecting with the main bore of thesection. ,.'As here sho\,vnthe adjacent ends of the sections 8f and 10 are expanded andy are internallyV threaded to engage the correspondinglythreaded Aends of `thesecytion `9 which is here shown of tubular, shape rand has V'the bore 21 thereofr ofy the same size as 'the bore of the section l10,'it being noted that the remote end ofthe bore 19 is closed by means y of a cap 22 arranged threaded engagementl inthe bore en Mounted in the bores 19 and 2l is a tubular member 23 having the outer diameter thereof somewhat less than the bore diameter to provide a passage outwardly of it and, as here shown, the member 23 preferably comprises a resilient spring defining a cylindrical passage 24 within it. The lowerI end 26 or' the member 23, it will now be noted, is arranged to seat in the section 8, the bore 27 of the latter being of the approximate diameter of the passage 24. Means are provided for holding the member 23 seated against the section 8, and as here shown, such means comprises a setscrew 28 mounted in the cap 22 and pivotally engaging a spring seat member 29 arranged to seat against the upper end` 'of the'member 23, and to close the bore 27 thereof, it being noted that centering of the member 23 is insured by means of an extension 31 protruding from the member 29 into the passage 24. In this manner, it will now be noted, adjustment of the length of the member 23 may be readily effected, so that the tension andr spacing of the turns may be 'varied at will to satisfy various requirements.

It will now be particularly noted that fluid flowing through the pipe will be delivered inside the helical member 23and that in passing through the device, it must pass between the various turns of the member 23, which thus combine to provide aport 'for the fluid, so that `the fluid will be given a combined rotary and radial motion which will prevent the passage of the fluid from producing said vibration in the device and will permit the device to absorb any vibrations transmitted to it from the adjacent fluid-carrying members. Furthermore, the effect of a sudden change in pressureat the ends of the member 23 will result in the resilient compression of at least part of it, so that hammering shocks are thus absorbed and so do not produce sound vibrations. Control of the maximum rate, or amount, of fluid flow through the device, it will be evident, is readily effected by adjusting the amount of set compression of the member 23 since the effective outlet from thev passage 24 may, as previously indicated, be readily controlled. The set screw head may, as here shown, be protected and covered by a cap 32.

It will now be further and particularly noted that the relative movement of the turns of the member 23 occasionedby the fluid flow `therethrough will prevent the collection of sediment thereon, so that the device will not need to be cleaned of such sediment as would be the casein devices of the same general class which utilize fixed and inflexible control structures.

Furthermore, though I have here shown the device utilized in combination with a flush tank, it will be evident that it may be inserted in any fluid circuit where noise is to be eliminated. Then too, since the passage of a liquid between the turns of the member separates the particles and therefore would tend to vaporize it, it will be evident that the device of my invention may also be applied for ell'ecting vaporization if so desired.

I claim:

l. A silencer for liquid flowing longitudinally through a conduit comprising a longitudinally compressible tubular member positioned within the conduit in spaced relation from the conduit sides and having a normally open helical port extending through its wall, and means arranged to insure the flow of liquid through said port and longitudinally past the end of the tubular member farthest removed from the intake end thereof as said liquid flows through said conduit.

2. A silencer for fluid flowing longitudinally through a conduit comprising a tubular member closed at one end and positioned longitudinally within the conduit in spaced relation from the sides thereof and having a normally open helical port in the walls thereof, and means operable to adjustably decrease the area of said port, said conduit and tubular member being arranged to cause the liquid to discharge in the direction of the vextent and past the end of said member opposite its intake. end. n

3. A silencer for fluid lowin nally through a conduit comprising a longitudinally and resiliently compressible helical member positioned within the conduit in spaced relation from the sides thereof and in generally coaxial relation thereto, and means manually operable to adjustably vary the length of said member.

4. In a silencer of the character described, a tubular member having a normally open helical port in the walls thereof, means operable to adjustably decrease the area of said port, said member arranged at all times to resiliently resist the operation of said means.

In testimony whereof, I have hereunto set my hand at akland, California, this 16th day of April, 1926.

` JOB EDWIN ERICSON.

longitudi- 

